source: trunk/packages/xen-3.1/xen-3.1/tools/libfsimage/ufs/ufs.h @ 34

Last change on this file since 34 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

File size: 9.5 KB
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1/*
2 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
3 * Use is subject to license terms.
4 */
5
6#ifndef _GRUB_UFS_H
7#define _GRUB_UFS_H_
8
9/* ufs specific constants */
10#define UFS_SBLOCK      16
11#define UFS_SBSIZE      8192
12#define UFS_MAGIC       0x011954
13#define ROOTINO         2       /* i number of all roots */
14#define UFS_NDADDR      12      /* direct blocks */
15#define UFS_NIADDR      3       /* indirect blocks */
16#define MAXMNTLEN       512
17#define MAXCSBUFS       32
18#define MAXNAMELEN      256
19
20/* file types */
21#define IFMT            0xf000
22#define IFREG           0x8000
23#define IFDIR           0x4000
24
25typedef unsigned char   grub_uchar_t;
26typedef unsigned short  grub_ushort_t;
27typedef unsigned short  grub_o_mode_t;
28typedef unsigned short  grub_o_uid_t;
29typedef unsigned short  grub_o_gid_t;
30typedef uint32_t        grub_ino_t;
31typedef int32_t         grub_int32_t;
32typedef int32_t         grub_uid_t;
33typedef int32_t         grub_gid_t;
34typedef uint32_t        grub_uint32_t;
35typedef uint32_t        grub_daddr32_t;
36typedef uint32_t        grub_time32_t;
37typedef struct { int val[2]; } grub_quad_t;
38
39struct timeval32 {
40        grub_time32_t   tv_sec;
41        grub_int32_t    tv_usec;
42};
43
44/*
45 * Per cylinder group information; summarized in blocks allocated
46 * from first cylinder group data blocks.  These blocks have to be
47 * read in from fs_csaddr (size fs_cssize) in addition to the
48 * super block.
49 *
50 * N.B. sizeof (struct csum) must be a power of two in order for
51 * the ``fs_cs'' macro to work (see below).
52 */
53struct csum {
54        grub_int32_t    cs_ndir;        /* number of directories */
55        grub_int32_t    cs_nbfree;      /* number of free blocks */
56        grub_int32_t    cs_nifree;      /* number of free inodes */
57        grub_int32_t    cs_nffree;      /* number of free frags */
58};
59
60/* Ufs super block */
61struct fs {
62        grub_uint32_t   fs_link;        /* linked list of file systems */
63        grub_uint32_t   fs_rolled;      /* logging only: fs fully rolled */
64        grub_daddr32_t  fs_sblkno;      /* addr of super-block in filesys */
65        grub_daddr32_t  fs_cblkno;      /* offset of cyl-block in filesys */
66        grub_daddr32_t  fs_iblkno;      /* offset of inode-blocks in filesys */
67        grub_daddr32_t  fs_dblkno;      /* offset of first data after cg */
68        grub_int32_t    fs_cgoffset;    /* cylinder group offset in cylinder */
69        grub_int32_t    fs_cgmask;      /* used to calc mod fs_ntrak */
70        grub_time32_t   fs_time;        /* last time written */
71        grub_int32_t    fs_size;        /* number of blocks in fs */
72        grub_int32_t    fs_dsize;       /* number of data blocks in fs */
73        grub_int32_t    fs_ncg;         /* number of cylinder groups */
74        grub_int32_t    fs_bsize;       /* size of basic blocks in fs */
75        grub_int32_t    fs_fsize;       /* size of frag blocks in fs */
76        grub_int32_t    fs_frag;        /* number of frags in a block in fs */
77        /* these are configuration parameters */
78        grub_int32_t    fs_minfree;     /* minimum percentage of free blocks */
79        grub_int32_t    fs_rotdelay;    /* num of ms for optimal next block */
80        grub_int32_t    fs_rps;         /* disk revolutions per second */
81        /* these fields can be computed from the others */
82        grub_int32_t    fs_bmask;       /* ``blkoff'' calc of blk offsets */
83        grub_int32_t    fs_fmask;       /* ``fragoff'' calc of frag offsets */
84        grub_int32_t    fs_bshift;      /* ``lblkno'' calc of logical blkno */
85        grub_int32_t    fs_fshift;      /* ``numfrags'' calc number of frags */
86        /* these are configuration parameters */
87        grub_int32_t    fs_maxcontig;   /* max number of contiguous blks */
88        grub_int32_t    fs_maxbpg;      /* max number of blks per cyl group */
89        /* these fields can be computed from the others */
90        grub_int32_t    fs_fragshift;   /* block to frag shift */
91        grub_int32_t    fs_fsbtodb;     /* fsbtodb and dbtofsb shift constant */
92        grub_int32_t    fs_sbsize;      /* actual size of super block */
93        grub_int32_t    fs_csmask;      /* csum block offset */
94        grub_int32_t    fs_csshift;     /* csum block number */
95        grub_int32_t    fs_nindir;      /* value of NINDIR */
96        grub_int32_t    fs_inopb;       /* value of INOPB */
97        grub_int32_t    fs_nspf;        /* value of NSPF */
98        /* yet another configuration parameter */
99        grub_int32_t    fs_optim;       /* optimization preference, see below */
100        /* these fields are derived from the hardware */
101        /* USL SVR4 compatibility */
102        /*
103         *      * USL SVR4 compatibility
104         *
105         * There was a significant divergence here between Solaris and
106         * SVR4 for x86.        By swapping these two members in the superblock,
107         * we get read-only compatibility of SVR4 filesystems.  Otherwise
108         * there would be no compatibility.     This change was introduced
109         * during bootstrapping of Solaris on x86.      By making this ifdef'ed
110         * on byte order, we provide ongoing compatibility across all
111         * platforms with the same byte order, the highest compatibility
112         * that can be achieved.
113         */
114        grub_int32_t    fs_state;       /* file system state time stamp */
115        grub_int32_t    fs_si;          /* summary info state - lufs only */
116        grub_int32_t    fs_trackskew;   /* sector 0 skew, per track */
117        /* unique id for this filesystem (currently unused and unmaintained) */
118        /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */
119        /* Neither of those fields is used in the Tahoe code right now but */
120        /* there could be problems if they are. */
121        grub_int32_t    fs_id[2];       /* file system id */
122        /* sizes determined by number of cylinder groups and their sizes */
123        grub_daddr32_t  fs_csaddr;      /* blk addr of cyl grp summary area */
124        grub_int32_t    fs_cssize;      /* size of cyl grp summary area */
125        grub_int32_t    fs_cgsize;      /* cylinder group size */
126        /* these fields are derived from the hardware */
127        grub_int32_t    fs_ntrak;       /* tracks per cylinder */
128        grub_int32_t    fs_nsect;       /* sectors per track */
129        grub_int32_t    fs_spc;         /* sectors per cylinder */
130        /* this comes from the disk driver partitioning */
131        grub_int32_t    fs_ncyl;        /* cylinders in file system */
132        /* these fields can be computed from the others */
133        grub_int32_t    fs_cpg;         /* cylinders per group */
134        grub_int32_t    fs_ipg;         /* inodes per group */
135        grub_int32_t    fs_fpg;         /* blocks per group * fs_frag */
136        /* this data must be re-computed after crashes */
137        struct csum     fs_cstotal;     /* cylinder summary information */
138        /* these fields are cleared at mount time */
139        char            fs_fmod;        /* super block modified flag */
140        char            fs_clean;       /* file system state flag */
141        char            fs_ronly;       /* mounted read-only flag */
142        char            fs_flags;       /* largefiles flag, etc. */
143        char            fs_fsmnt[MAXMNTLEN];    /* name mounted on */
144        /* these fields retain the current block allocation info */
145        grub_int32_t    fs_cgrotor;     /* last cg searched */
146        /*
147         * The following used to be fs_csp[MAXCSBUFS]. It was not
148         * used anywhere except in old utilities.  We removed this
149         * in 5.6 and expect fs_u.fs_csp to be used instead.
150         * We no longer limit fs_cssize based on MAXCSBUFS.
151         */
152        union { /* fs_cs (csum) info */
153                grub_uint32_t   fs_csp_pad[MAXCSBUFS];
154                struct csum     *fs_csp;
155        } fs_u;
156        grub_int32_t    fs_cpc;         /* cyl per cycle in postbl */
157        short           fs_opostbl[16][8];  /* old rotation block list head */
158        grub_int32_t    fs_sparecon[51];    /* reserved for future constants */
159        grub_int32_t    fs_version;     /* minor version of MTB ufs */
160        grub_int32_t    fs_logbno;      /* block # of embedded log */
161        grub_int32_t    fs_reclaim;     /* reclaim open, deleted files */
162        grub_int32_t    fs_sparecon2;   /* reserved for future constant */
163        /* USL SVR4 compatibility */
164        grub_int32_t    fs_npsect;      /* # sectors/track including spares */
165        grub_quad_t     fs_qbmask;      /* ~fs_bmask - for use with quad size */
166        grub_quad_t     fs_qfmask;      /* ~fs_fmask - for use with quad size */
167        grub_int32_t    fs_postblformat; /* fmt of positional layout tables */
168        grub_int32_t    fs_nrpos;       /* number of rotaional positions */
169        grub_int32_t    fs_postbloff;   /* (short) rotation block list head */
170        grub_int32_t    fs_rotbloff;    /* (grub_uchar_t) blocks for each */
171                                        /* rotation */
172        grub_int32_t    fs_magic;       /* magic number */
173        grub_uchar_t    fs_space[1];    /* list of blocks for each rotation */
174        /* actually longer */
175};
176
177struct icommon {
178        grub_o_mode_t   ic_smode;       /* 0: mode and type of file */
179        short           ic_nlink;       /* 2: number of links to file */
180        grub_o_uid_t    ic_suid;        /* 4: owner's user id */
181        grub_o_gid_t    ic_sgid;        /* 6: owner's group id */
182        grub_uint32_t   ic_sizelo;      /* 8: number of bytes in file */
183        grub_uint32_t   ic_sizehi;      /* 12: number of bytes in file */
184        struct timeval32 ic_atime;      /* 16: time last accessed */
185        struct timeval32 ic_mtime;      /* 24: time last modified */
186        struct timeval32 ic_ctime;      /* 32: last time inode changed */
187        grub_daddr32_t  ic_db[UFS_NDADDR];      /* 40: disk block addresses */
188        grub_daddr32_t  ic_ib[UFS_NIADDR];      /* 88: indirect blocks */
189        grub_int32_t    ic_flags;       /* 100: cflags */
190        grub_int32_t    ic_blocks;      /* 104: 512 byte blocks actually held */
191        grub_int32_t    ic_gen;         /* 108: generation number */
192        grub_int32_t    ic_shadow;      /* 112: shadow inode */
193        grub_uid_t      ic_uid;         /* 116: long EFT version of uid */
194        grub_gid_t      ic_gid;         /* 120: long EFT version of gid */
195        grub_uint32_t   ic_oeftflag;    /* 124: extended attr directory ino, */
196                                        /*      0 = none */
197};
198
199struct direct {
200        grub_ino_t      d_ino;
201        grub_ushort_t   d_reclen;
202        grub_ushort_t   d_namelen;
203        char            d_name[MAXNAMELEN + 1];
204};
205
206/* inode macros */
207#define INOPB(fs)       ((fs)->fs_inopb)
208#define itoo(fs, x)     ((x) % (grub_uint32_t)INOPB(fs))
209#define itog(fs, x)     ((x) / (grub_uint32_t)(fs)->fs_ipg)
210#define itod(fs, x)     ((grub_daddr32_t)(cgimin(fs, itog(fs, x)) + \
211  (blkstofrags((fs), \
212  ((x) % (grub_uint32_t)(fs)->fs_ipg / (grub_uint32_t)INOPB(fs))))))
213
214/* block conversion macros */
215#define UFS_NINDIR(fs)  ((fs)->fs_nindir)       /* # of indirects */
216#define blkoff(fs, loc) ((int)((loc & ~(fs)->fs_bmask)))
217#define lblkno(fs, loc) ((grub_int32_t)((loc) >> (fs)->fs_bshift))
218/* frag to blk */
219#define fsbtodb(fs, b)  (((grub_daddr32_t)(b)) << (fs)->fs_fsbtodb)
220#define blkstofrags(fs, b) ((b) << (fs)->fs_fragshift)
221
222/* cynlinder group macros */
223#define cgbase(fs, c)   ((grub_daddr32_t)((fs)->fs_fpg * (c)))
224#define cgimin(fs, c)   (cgstart(fs, c) + (fs)->fs_iblkno) /* inode block */
225#define cgstart(fs, c) \
226  (cgbase(fs, c) + (fs)->fs_cgoffset * ((c) & ~((fs)->fs_cgmask)))
227
228#endif /* !_GRUB_UFS_H */
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